Hi Alousia, those were made using the old version of Guitar Pro. Formating of tabs were slightly different using the old version, which may explain the difference you’ve noticed. Unfortunately, I can not find a feature to edit the number of lines per page, only bars per line.
An idea would be to print the tabs on a sheet larger than 8×11 (I believe that’s the standard size). You can set a printer’s setting to fill the page, which would expand the size of the bars. Perhaps a specialty print shop has such a printer.